Ball valve for refrigerating systems

Abstract

Improved ball valve for refrigerating systems, formed by a valve body and an inlet duct and an outlet duct. The other component parts such as a ball shutter, a circular flange, a closure member, an actuating means and sealing means are all mounted by introducing them from the above. In this ball valve the operations of replacing the components are very much simplified, rapid and economical.

I claim: 
     
       1. An improved ball valve for refrigerating systems, comprising a valve body having an inlet duct and an outlet duct, a ball shutter accommodated within said valve body, actuating means for rotating said ball shutter, said valve body having an upper aperture of greater dimensions than the diameter of said ball shutter to permit said ball shutter to be mounted from above, a circular member engaging said valve body and adapted to limit rotation of said actuating means and ball shutter to 90° and forming a supporting member for said actuating means, a closure member engaging said valve body over said actuating means to urge the actuating means against said circular member. 
     
     
       2. An improved ball valve for refrigerating systems, comprising a valve body having an inlet duct and an outlet duct, a ball shutter accommodated within said valve body, actuating means for rotating said ball shutter, said actuating means including a stem having a flattened side, a closure member surrounding said actuating means and engaging the interior of said valve body to prevent movement of the actuating means away from the ball shutter, a circular member arranged between said ball shutter and said closure member to limit the rotation of said ball shutter to 90°, said circular member engaging said valve body to prevent rotation of the circular member relative to the valve body and being provided with an appropriately shaped central hole having spaced stops, said circular member central hole receiving said actuating means stem for angular movement of its said flattened side therein between said stops. 
     
     
       3. An improved ball valve as claimed in claim 2, wherein said closure member is centrally provided with a cylindrical seat carrying said stem adapted to actuate said ball shutter. 
     
     
       4. An improved ball valve as claimed in claim 3, wherein a shoulder is provided at the upper end of said cylindrical seat to form means for preventing said actuating means from being extracted from said cylindrical seat. 
     
     
       5. An improved ball valve as claimed in claim 4, wherein said actuating means is formed by said stem having along its peripheral surface alternately a plurality of grooves and rings. 
     
     
       6. An improved ball valve as claimed in claim 2, wherein said circular member forms a supporting base for said actuating means so as to define a perpendicular position between these members. 
     
     
       7. An improved ball valve as claimed in claim 2, wherein said circular member is formed by a circular flange provided with two diametrically opposed peripheral lugs projecting from the lower surface of said flange and engaging corresponding groove seats provided in the upper portion of said valve body. 
     
     
       8. An improved ball valve as claimed in claim 2, wherein a pin projects from one end of said actuating means and is inserted in a thru hole arranged vertically in said ball shutter and is caulked at one end thereof to provide a firm connection between said actuating means and said ball shutter.